Jim Parsons and Rihanna Celebrate Smekday

DreamWorks Animation announced that The Big Bang Theory's Jim Parsons and pop star-actress Rihanna will lead the voice cast of the studio's upcoming animated feature film Happy Smekday!, based on Adam Rex's book "The True Meaning of Smekday."

The toon, slated for a late 2014 release, will be directed by Antz's Tim Johnson from a screenplay adaptation being penned by Get Smart's Tom J. Astle and Matt Ember.

In Happy Smekday! an alien race invades Earth and uses it as a hideout from their mortal enemy. When one lowly alien accidentally notifies the enemies of his whereabouts, he is forced to go on the run with a teenage girl. The two become unlikely buddies and embark on a comical globe-trotting adventure to right his wrongs, in which our alien hero learns what it really means to be human.

"Adam's hilarious book is the perfect recipe for a compelling animated feature and we are ecstatic that Jim Parsons and Rihanna will contribute their immense talents to the production," said Bill Damaschke, DreamWorks Animation's Chief Creative Officer, in a statement. "We're also thrilled that Tim Johnson is back to direct another DreamWorks Animation feature film and show the world just how fun an alien invasion can be!"